Fixed displayId change / visibility check on enqueueToast()

It should change the displayId first and check if user is visible
on display afterwards - these 2 changes were added in separate CLs,
but in the wrong order.

Test: adb shell dumpsys 'activity --user 11 com.google.android.car.kitchensink/.KitchenSinkActivity cmd post-toast --app-context --long-toast -v "Look at all this info!"'
Test: atest NotificationManagerServiceTest

Bug: 273314058

Change-Id: Ic5b26be2311a1eff9ce4aa8d3fdfeda5aa8fa3a4